Improved gear-wheel



'lttteii tttet @sind @jitte- WILLIAM H. WARD, or AUBRN, NEW YORK.

Letters Patent No. 103,398, dated May v24, 1870.

IMPRovED GEAR-'WHEEL The Schedule referred to in these Letters Patent and making part cf the sauneV To all whom tt may concern panying drawings of the same, which marke part of this specification, and in which- Y Figure 1 'represents an elevation ot' the side ot' a gear or cogged wheelcmhracing my invention.

Figure 2 represents an elevation of the side and edge of the adjustable tbothed or cogged rim detached from the hub and arms.;

Figure 3 represents the huh and armsin elevation and section, detached from the toothed or cogged rim. Myinvention relates to toothed gear-wheels, and consists in-inteirupting thc continuity of the fixed seat, so as to form 'recesses for the reception of projections from the toothed inclosing rim, whereby the latter may bejclainped by set-screws 'arranged within the face of the whe'el, so as tobear upon the inner side 'of' the rim, out of lthe way and fi'ee fromdanger of being broken o.

Also, inthe combination and arrangement of the several parts constituting an adjustable gear-wheel.

1n the accompanying drawingslhe hub A and the arms B of the wheel may he of any desirable pattern or construction. The arms and hub are not, as heretofore, cast with the rim of the wheel, but are separate and distinct from it, and l made with (or without) a rim, C, that encircles the extremities of the arms, and which constitutes a seat for the outer toothed rim. The surface of this seat may or may not he equal to the width of the cogged rim, and its continuity is interrupted at its junction with the arms, so -as to formrecesses a ofsuoli size and in such manner usato admit ot the insertion of screw-bolts b, or their equivalents, through each side of said recessed portionofihe-rm, so that their points of bearing will approach each other from cach side of the arms B and at an angle with the'arms. The part thus constructed coustitntesthe fixed member of the wheel, and is secured or keyed in the usual manner to the revolving shaft D. A

The cogged toothed rim E constitutes the adjustable member of the wheel, and itsinuer concentric surface is of a diametersuiiicient to allow it to be properly fitted upon the webor seat C of the fixed part of the wheel, as shown in fig. 1. 'lhe outside of this rim is constructed with cogs or teeth o in the usual manner, while the inner side has a suitable number .of projections, '11, of such form and size as to extend into each` recess andI between-the converging points of the screws, in snc-li mannerfthat the latter' will bear against the opposite sides of the projections d, and leave suiicient space between their bearing points and the sides of the recess in the seat for the proper adjustment of the cogged rim.

The number .oi recesses in the fixed rim C must be equal to the number of' projections d of the adj nstable riin E, and the space within the recesses o must be such as to admit of' any amount of adjustment necessary for the toothed rim E, equal to the greatest wear ofsthe teeth. y

The adjustable rim and the interior iixed part are held together by the binding hohl or grip of the adjusting screws, which, it will bc seen, pass through the recessed portion of the xed scat C, and hear upon and agaiustthe opposite sides of the projections d ot' the adjustable rim E, so as to bite and clamp the said project-ions between them, while the ang-les of these` set screws b, or their substitutesgrith reference to the axis of the wheel, are such as'that one will bear hard obliquely against one sident' the projection d of the toothed rim E, and the other will bear with like force from an oppositely oblique' direction against the other lside otf the said projection d, and thus the two parts4 are locked as firmly together as though they were made in one`and the same wheel. Thile the screws (orkeys) b thus lock the two parts of the wheel together, they also constitute the means for adjusting the toothed rim E upon the seat O of the iixed part, either to the right or to the lei't, accordiugto the direction the wheel is revolving, and this ,isidonc by unscrewing, and thus slackening the set screws in the direction required, and tightening or screwing up those on the opposite side of the recesses, and, as the part to which the said setscrews are secured is fixed upon its shaft I), it will be seen that the rim E must move either to the right or left upon its fixed seat C, and thus effect the required adjustment to compensate for the wear ot' the work sides of' the teeth and the wheels adjusted, causing the rotaryr` dies, &c.,`to revolve in perfect register, so that, whenever motion is imparted to one shaftor wheel, the adjacent wheels into which it matches must respond to it with rigid firmness and exactuess,A whereby a mill provided with theseadjustablegear-wheels can produce articles heretofore con#v sidered impossible to roll correctiy, by reason of the wear and looseness of the teeth of the gear-wheels, because the slightest starting and stopping of the driving-wheel, without instantly imparting suoli motion to theother wheels, causes the whole to rotate ont of order; but, with' these adjustable wheels, all must move with it in exact uuisoiuand wthbut the least looseness or jerking motion wha-teven' ii' properly adjusted.

In order to cut off any back-lash or worm mot-ion of the gearing, two of' these adjustable wheels are secured on the saine shaft, and, by a simple counter adjustment of one of them, whatever lost motion, (if any,) lthat may exist can be easily taken up by this connter adjustment of the other Wheel. v

Ido not confine myself to the exclusive use of setscrews, but consider myself' at liberty to substitute keys, or their equivalent, if found better in practice, or it may be necessary to attach what is known in niechanics as jam-nuts, to retain the" set-screws firmly in position. A

It is obvious that this adjustable gear-wheel is applicable to any kind of rolling or other mills that use rotary stamping and compressing-dies,y where great exactness lof motion is required, .and it may be used in connection with ordinary intermediate gearing in various Ways Without departing from the spirit of my i invention.

Having described my invention,

I claim- 1. The seat C of' the fixed part of the wheel, having its continuity interrupted, so as to form recesses a, in combination with the toothed nclosing rim E, having projections d, for fitting into the recesses, substantially as before described.

2`. .'lhe combination of the xed hub A, fixed recessed concentric seat C, and adjusting-screws b, or their equivalent, with the toothed adjustable inclosing rim E, constructed, arranged, and operating substantially as described.

" W. H; WARD.

Witnesses:

L. A. WARD, G. HOLLAND. 

